Справочник Пользователя для Hamilton Sundstrand Company Fuel Metering Valves XVG

 

 

 

 
The following Modbus functions are supported by the XVG/eXVG: 
 

-  Read Registers (0x03) 
-  Write Single Register (0x06) 
-  Write Multiple Registers (0x10) 
-  Diagnostics (0x08) Query Data sub-function (0x00)  

 
The master can address individual slaves, or can initiate a broadcast message (using 
device address 0) to all slaves. Slaves perform the actions requested by the broadcast 
messages but will not return a response.  Per Modbus protocol, only Write Single 
Register (0x06) and Write Multiple Registers (0x10) support broadcast message. 
 
7.4.1 Read Registers (0x03)   
 
Request message:   
SLAVE ADDRESS + FUNCTION CODE + STARTING ADDRESS + QUANTITY 
OF REGISTERS + CRC 
 

Request 

Slave Address 

1 Byte  

0 to 247 

Function code  

1 Byte  

0x03 

Starting Address  

2 Bytes  

0x0000 to 0xFFFF 

Quantity of Registers 

2 Bytes  

1 to 125 (0x7D) 

CRC 2 

Bytes 

0x0000 to 0xFFFF 

 
 
Response message: 
SLAVE ADDRESS + FUNCTION CODE + BYTES COUNT + REGISTERS 
VALUES + CRC 
 

Response 

Slave Address 

1 Byte  

0 to 247 

Function code   

1 Byte  

0x03 

Byte count  

1 Byte  

2xN 

Registers Values 

2xN Bytes 

value 

CRC 2 

Bytes 

0x0000 to 0xFFFF 

*N = Quantity of Registers 

 

 

 
 
 
 
 

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